Dental articulator.



PATENTED DEC. '1 '7, 1907.

W. HARE. DENTAL ARTIGULATOR. AP'PLIOATION FILED JULY 1, 1907.

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WILLIAM HARE, OF GALESBURG, ILLINOIS.

DENTAL ARTICULATOR.

Specification of Letters Patent.

Patented Dec. 17, 1907.

Application filed July 1, 1907- Serial No. 381,667.

It is also an object of the invention to provide a novel device of thischaracter whereby the upper plate will automatically separate from thelower plate.

Furthermore, an object of this invention is to produce a device of thecharacter noted, which will possess advantages in points of simplicity,efliciency and durability, proving at the same time comparativelyinexpensive to manufacture. 7

With the foregoing and other objects in view, the invention consists inthe details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanyingdrawings forming part of this specification wherein likecharacters denote corresponding parts in the several views, in which-Figure 1, is a view in perspective of the invention; Fig. 2, is a topplan view and Fig. 3,

a side elevation.

In the drawings 1, denotes the lower plate which may be of anyappropriate size and shape having the rear vertical lugs 2, providedwith the alining perforations 3, which are adapted to receive the pivotpin 4. This pivot pin 4, passes through the end of the plate 5, to whichis secured the upper plate 6.

The rear portion of this upper plate 6, is

provided with an elongated slot 7, through which passes a securing screw8. This upper plate is also provided with the transverse openings 9,through which the pin 10, passes. By this arrangement, the upper plate6, may be adjusted longitudinally, the pin contacting with the screw 8,and thereby limiting the upper plate in any rearward movement that maybe exerted thereon by the spring member 11, to be hereinafter referredto. The lower plate 1, is provided with the level ing screw 12, as inthe ordinary structure.

Carried by the lugs 2, are the straps 13, which form guide-ways for thebar 14. This bar is provided intermediate its length with a hook 15, towhich is secured one end of an elastic medium 16, the opposite end beingsecured to the inner end of the upper plate 6. By moving this bar 14,within its guides, the tension of this elastic medium 16 may be variedor adjusted. This elastic medium is for the purpose of automaticallyelevating the upper plate 6, as will, it is thought, be fullyappreciated.

What I claim is:

1. In combination, a lower plate, an upper plate pivoted thereto, andelastic means connected to the upper plate and the lower plate forelevating the upper plate.

2. In combination, a lower plate, an upper plate pivoted thereto, anelastic means connected to the upper plate and the lower plate forelevating the upper plate, and means for adjusting the tension of theelastic means.

3. In combination, a lower plate, an upper plate pivoted thereto, a barmovably held. by the lower plate, and an elastic medium secured to thebar and to the upper plate to elevate the upper plate.

In testimony whereof I aflix my signature in the presence of twowitnesses this 29th day of June, 1907.

. WILLIAM HARE. Witnesses:

EDWARD H. KEGLEY, THEODORE WALLACE.

